Cheat ModeStart the game with the "/cheat" command line parameter to enable cheat mode:

[F9] - Level skip[F1] - More ammo for player one[F5] - More ammo for player two[F2] - More cow bombs for player one[F6] - More cow bombs for player two[F3] - More lives for player one[F7] - More lives for player two

More firepower and easy livesIn single player mode, you can get more firepower and more lives by setting the controls of both players to be exactly the same. For example, player one: Fire=Space and player two Fire=Space. By doing this, you can focus on one blob, but the other blob will move with and shoot with you. This kills more enemies and gets you to higher levels. A good idea is to set the special key to a different button for each player so that you can get double the cow bombs.